1 /****************************************************************************** 2 * 3 * Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 /** 19 ******************************************************************************* 20 * @file 21 * ihevc_sao.c 22 * 23 * @brief 24 * Contains leaf level function definitions for sample adaptive offset process 25 * 26 * @author 27 * Srinivas T 28 * 29 * @par List of Functions: 30 * - ihevc_sao_band_offset_luma() 31 * - ihevc_sao_band_offset_chroma() 32 * - ihevc_sao_edge_offset_class0() 33 * - ihevc_sao_edge_offset_class0_chroma() 34 * - ihevc_sao_edge_offset_class1() 35 * - ihevc_sao_edge_offset_class1_chroma() 36 * - ihevc_sao_edge_offset_class2() 37 * - ihevc_sao_edge_offset_class2_chroma() 38 * - ihevc_sao_edge_offset_class3() 39 * - ihevc_sao_edge_offset_class3_chroma() 40 * @remarks 41 * None 42 * 43 ******************************************************************************* 44 */ 45 #include <stdlib.h> 46 #include <assert.h> 47 #include <string.h> 48 #include "ihevc_typedefs.h" 49 #include "ihevc_macros.h" 50 #include "ihevc_platform_macros.h" 51 #include "ihevc_func_selector.h" 52 #include "ihevc_defs.h" 53 #include "ihevc_structs.h" 54 #include "ihevc_sao.h" 55 56 #define NUM_BAND_TABLE 32 57 58 const WORD32 gi4_ihevc_table_edge_idx[5] = { 1, 2, 0, 3, 4 }; 59 /** 60 * au4_avail is an array of flags - one for each neighboring block specifying if the block is available 61 * au4_avail[0] - left 62 * au4_avail[1] - right 63 * au4_avail[2] - top 64 * au4_avail[3] - bottom 65 * au4_avail[4] - top-left 66 * au4_avail[5] - top-right 67 * au4_avail[6] - bottom-left 68 * au4_avail[7] - bottom-right 69 */ 70 71 72 void ihevc_sao_band_offset_luma(UWORD8 *pu1_src, 73 WORD32 src_strd, 74 UWORD8 *pu1_src_left, 75 UWORD8 *pu1_src_top, 76 UWORD8 *pu1_src_top_left, 77 WORD32 sao_band_pos, 78 WORD8 *pi1_sao_offset, 79 WORD32 wd, 80 WORD32 ht) 81 { 82 WORD32 band_shift; 83 WORD32 band_table[NUM_BAND_TABLE]; 84 WORD32 i; 85 WORD32 row, col; 86 87 /* Updating left and top and top-left */ 88 for(row = 0; row < ht; row++) 89 { 90 pu1_src_left[row] = pu1_src[row * src_strd + (wd - 1)]; 91 } 92 pu1_src_top_left[0] = pu1_src_top[wd - 1]; 93 for(col = 0; col < wd; col++) 94 { 95 pu1_src_top[col] = pu1_src[(ht - 1) * src_strd + col]; 96 } 97 98 band_shift = BIT_DEPTH_LUMA - 5; 99 for(i = 0; i < NUM_BAND_TABLE; i++) 100 { 101 band_table[i] = 0; 102 } 103 for(i = 0; i < 4; i++) 104 { 105 band_table[(i + sao_band_pos) & 31] = i + 1; 106 } 107 108 for(row = 0; row < ht; row++) 109 { 110 for(col = 0; col < wd; col++) 111 { 112 WORD32 band_idx; 113 114 band_idx = band_table[pu1_src[col] >> band_shift]; 115 pu1_src[col] = CLIP3(pu1_src[col] + pi1_sao_offset[band_idx], 0, (1 << (band_shift + 5)) - 1); 116 } 117 pu1_src += src_strd; 118 } 119 } 120 121 122 123 /* input 'wd' has to be for the interleaved block and not for each color component */ 124 void ihevc_sao_band_offset_chroma(UWORD8 *pu1_src, 125 WORD32 src_strd, 126 UWORD8 *pu1_src_left, 127 UWORD8 *pu1_src_top, 128 UWORD8 *pu1_src_top_left, 129 WORD32 sao_band_pos_u, 130 WORD32 sao_band_pos_v, 131 WORD8 *pi1_sao_offset_u, 132 WORD8 *pi1_sao_offset_v, 133 WORD32 wd, 134 WORD32 ht) 135 { 136 WORD32 band_shift; 137 WORD32 band_table_u[NUM_BAND_TABLE]; 138 WORD32 band_table_v[NUM_BAND_TABLE]; 139 WORD32 i; 140 WORD32 row, col; 141 142 /* Updating left and top and top-left */ 143 for(row = 0; row < ht; row++) 144 { 145 pu1_src_left[2 * row] = pu1_src[row * src_strd + (wd - 2)]; 146 pu1_src_left[2 * row + 1] = pu1_src[row * src_strd + (wd - 1)]; 147 } 148 pu1_src_top_left[0] = pu1_src_top[wd - 2]; 149 pu1_src_top_left[1] = pu1_src_top[wd - 1]; 150 for(col = 0; col < wd; col++) 151 { 152 pu1_src_top[col] = pu1_src[(ht - 1) * src_strd + col]; 153 } 154 155 156 band_shift = BIT_DEPTH_CHROMA - 5; 157 for(i = 0; i < NUM_BAND_TABLE; i++) 158 { 159 band_table_u[i] = 0; 160 band_table_v[i] = 0; 161 } 162 for(i = 0; i < 4; i++) 163 { 164 band_table_u[(i + sao_band_pos_u) & 31] = i + 1; 165 band_table_v[(i + sao_band_pos_v) & 31] = i + 1; 166 } 167 168 for(row = 0; row < ht; row++) 169 { 170 for(col = 0; col < wd; col++) 171 { 172 WORD32 band_idx; 173 WORD8 *pi1_sao_offset; 174 175 pi1_sao_offset = (0 == col % 2) ? pi1_sao_offset_u : pi1_sao_offset_v; 176 band_idx = (0 == col % 2) ? band_table_u[pu1_src[col] >> band_shift] : band_table_v[pu1_src[col] >> band_shift]; 177 pu1_src[col] = CLIP3(pu1_src[col] + pi1_sao_offset[band_idx], 0, (1 << (band_shift + 5)) - 1); 178 } 179 pu1_src += src_strd; 180 } 181 } 182 183 184 185 /* Horizontal filtering */ 186 void ihevc_sao_edge_offset_class0(UWORD8 *pu1_src, 187 WORD32 src_strd, 188 UWORD8 *pu1_src_left, 189 UWORD8 *pu1_src_top, 190 UWORD8 *pu1_src_top_left, 191 UWORD8 *pu1_src_top_right, 192 UWORD8 *pu1_src_bot_left, 193 UWORD8 *pu1_avail, 194 WORD8 *pi1_sao_offset, 195 WORD32 wd, 196 WORD32 ht) 197 { 198 WORD32 row, col; 199 UWORD8 au1_mask[MAX_CTB_SIZE]; 200 UWORD8 au1_src_left_tmp[MAX_CTB_SIZE]; 201 WORD8 u1_sign_left, u1_sign_right; 202 WORD32 bit_depth; 203 UNUSED(pu1_src_top_right); 204 UNUSED(pu1_src_bot_left); 205 bit_depth = BIT_DEPTH_LUMA; 206 207 /* Initialize the mask values */ 208 memset(au1_mask, 0xFF, MAX_CTB_SIZE); 209 210 /* Update top and top-left arrays */ 211 *pu1_src_top_left = pu1_src_top[wd - 1]; 212 for(row = 0; row < ht; row++) 213 { 214 au1_src_left_tmp[row] = pu1_src[row * src_strd + wd - 1]; 215 } 216 for(col = 0; col < wd; col++) 217 { 218 pu1_src_top[col] = pu1_src[(ht - 1) * src_strd + col]; 219 } 220 221 /* Update masks based on the availability flags */ 222 if(0 == pu1_avail[0]) 223 { 224 au1_mask[0] = 0; 225 } 226 if(0 == pu1_avail[1]) 227 { 228 au1_mask[wd - 1] = 0; 229 } 230 231 /* Processing is done on the intermediate buffer and the output is written to the source buffer */ 232 { 233 for(row = 0; row < ht; row++) 234 { 235 u1_sign_left = SIGN(pu1_src[0] - pu1_src_left[row]); 236 for(col = 0; col < wd; col++) 237 { 238 WORD32 edge_idx; 239 240 u1_sign_right = SIGN(pu1_src[col] - pu1_src[col + 1]); 241 edge_idx = 2 + u1_sign_left + u1_sign_right; 242 u1_sign_left = -u1_sign_right; 243 244 edge_idx = gi4_ihevc_table_edge_idx[edge_idx] & au1_mask[col]; 245 246 if(0 != edge_idx) 247 { 248 pu1_src[col] = CLIP3(pu1_src[col] + pi1_sao_offset[edge_idx], 0, (1 << bit_depth) - 1); 249 } 250 } 251 252 pu1_src += src_strd; 253 } 254 } 255 256 /* Update left array */ 257 for(row = 0; row < ht; row++) 258 { 259 pu1_src_left[row] = au1_src_left_tmp[row]; 260 } 261 262 } 263 264 265 266 267 /* input 'wd' has to be for the interleaved block and not for each color component */ 268 void ihevc_sao_edge_offset_class0_chroma(UWORD8 *pu1_src, 269 WORD32 src_strd, 270 UWORD8 *pu1_src_left, 271 UWORD8 *pu1_src_top, 272 UWORD8 *pu1_src_top_left, 273 UWORD8 *pu1_src_top_right, 274 UWORD8 *pu1_src_bot_left, 275 UWORD8 *pu1_avail, 276 WORD8 *pi1_sao_offset_u, 277 WORD8 *pi1_sao_offset_v, 278 WORD32 wd, 279 WORD32 ht) 280 { 281 WORD32 row, col; 282 UWORD8 au1_mask[MAX_CTB_SIZE]; 283 UWORD8 au1_src_left_tmp[2 * MAX_CTB_SIZE]; 284 WORD8 u1_sign_left_u, u1_sign_right_u; 285 WORD8 u1_sign_left_v, u1_sign_right_v; 286 WORD32 bit_depth; 287 UNUSED(pu1_src_top_right); 288 UNUSED(pu1_src_bot_left); 289 bit_depth = BIT_DEPTH_CHROMA; 290 291 /* Initialize the mask values */ 292 memset(au1_mask, 0xFF, MAX_CTB_SIZE); 293 294 /* Update left, top and top-left arrays */ 295 pu1_src_top_left[0] = pu1_src_top[wd - 2]; 296 pu1_src_top_left[1] = pu1_src_top[wd - 1]; 297 for(row = 0; row < ht; row++) 298 { 299 au1_src_left_tmp[2 * row] = pu1_src[row * src_strd + wd - 2]; 300 au1_src_left_tmp[2 * row + 1] = pu1_src[row * src_strd + wd - 1]; 301 } 302 for(col = 0; col < wd; col++) 303 { 304 pu1_src_top[col] = pu1_src[(ht - 1) * src_strd + col]; 305 } 306 307 /* Update masks based on the availability flags */ 308 if(0 == pu1_avail[0]) 309 { 310 au1_mask[0] = 0; 311 } 312 if(0 == pu1_avail[1]) 313 { 314 au1_mask[(wd - 1) >> 1] = 0; 315 } 316 317 /* Processing is done on the intermediate buffer and the output is written to the source buffer */ 318 { 319 for(row = 0; row < ht; row++) 320 { 321 u1_sign_left_u = SIGN(pu1_src[0] - pu1_src_left[2 * row]); 322 u1_sign_left_v = SIGN(pu1_src[1] - pu1_src_left[2 * row + 1]); 323 for(col = 0; col < wd; col++) 324 { 325 WORD32 edge_idx; 326 WORD8 *pi1_sao_offset; 327 328 if(0 == col % 2) 329 { 330 pi1_sao_offset = pi1_sao_offset_u; 331 u1_sign_right_u = SIGN(pu1_src[col] - pu1_src[col + 2]); 332 edge_idx = 2 + u1_sign_left_u + u1_sign_right_u; 333 u1_sign_left_u = -u1_sign_right_u; 334 } 335 else 336 { 337 pi1_sao_offset = pi1_sao_offset_v; 338 u1_sign_right_v = SIGN(pu1_src[col] - pu1_src[col + 2]); 339 edge_idx = 2 + u1_sign_left_v + u1_sign_right_v; 340 u1_sign_left_v = -u1_sign_right_v; 341 } 342 343 edge_idx = gi4_ihevc_table_edge_idx[edge_idx] & au1_mask[col >> 1]; 344 345 if(0 != edge_idx) 346 { 347 pu1_src[col] = CLIP3(pu1_src[col] + pi1_sao_offset[edge_idx], 0, (1 << bit_depth) - 1); 348 } 349 } 350 351 pu1_src += src_strd; 352 } 353 } 354 355 for(row = 0; row < 2 * ht; row++) 356 { 357 pu1_src_left[row] = au1_src_left_tmp[row]; 358 } 359 360 } 361 362 363 364 /* Vertical filtering */ 365 void ihevc_sao_edge_offset_class1(UWORD8 *pu1_src, 366 WORD32 src_strd, 367 UWORD8 *pu1_src_left, 368 UWORD8 *pu1_src_top, 369 UWORD8 *pu1_src_top_left, 370 UWORD8 *pu1_src_top_right, 371 UWORD8 *pu1_src_bot_left, 372 UWORD8 *pu1_avail, 373 WORD8 *pi1_sao_offset, 374 WORD32 wd, 375 WORD32 ht) 376 { 377 WORD32 row, col; 378 UWORD8 au1_mask[MAX_CTB_SIZE]; 379 UWORD8 au1_src_top_tmp[MAX_CTB_SIZE]; 380 WORD8 au1_sign_up[MAX_CTB_SIZE]; 381 WORD8 u1_sign_down; 382 WORD32 bit_depth; 383 UNUSED(pu1_src_top_right); 384 UNUSED(pu1_src_bot_left); 385 386 bit_depth = BIT_DEPTH_LUMA; 387 388 /* Initialize the mask values */ 389 memset(au1_mask, 0xFF, MAX_CTB_SIZE); 390 391 /* Update left, top and top-left arrays */ 392 *pu1_src_top_left = pu1_src_top[wd - 1]; 393 for(row = 0; row < ht; row++) 394 { 395 pu1_src_left[row] = pu1_src[row * src_strd + wd - 1]; 396 } 397 for(col = 0; col < wd; col++) 398 { 399 au1_src_top_tmp[col] = pu1_src[(ht - 1) * src_strd + col]; 400 } 401 402 /* Update height and source pointers based on the availability flags */ 403 if(0 == pu1_avail[2]) 404 { 405 pu1_src += src_strd; 406 ht--; 407 for(col = 0; col < wd; col++) 408 { 409 au1_sign_up[col] = SIGN(pu1_src[col] - pu1_src[col - src_strd]); 410 } 411 } 412 else 413 { 414 for(col = 0; col < wd; col++) 415 { 416 au1_sign_up[col] = SIGN(pu1_src[col] - pu1_src_top[col]); 417 } 418 } 419 if(0 == pu1_avail[3]) 420 { 421 ht--; 422 } 423 424 /* Processing is done on the intermediate buffer and the output is written to the source buffer */ 425 { 426 for(row = 0; row < ht; row++) 427 { 428 for(col = 0; col < wd; col++) 429 { 430 WORD32 edge_idx; 431 432 u1_sign_down = SIGN(pu1_src[col] - pu1_src[col + src_strd]); 433 edge_idx = 2 + au1_sign_up[col] + u1_sign_down; 434 au1_sign_up[col] = -u1_sign_down; 435 436 edge_idx = gi4_ihevc_table_edge_idx[edge_idx] & au1_mask[col]; 437 438 if(0 != edge_idx) 439 { 440 pu1_src[col] = CLIP3(pu1_src[col] + pi1_sao_offset[edge_idx], 0, (1 << bit_depth) - 1); 441 } 442 } 443 444 pu1_src += src_strd; 445 } 446 } 447 448 for(col = 0; col < wd; col++) 449 { 450 pu1_src_top[col] = au1_src_top_tmp[col]; 451 } 452 453 } 454 455 456 457 /* input 'wd' has to be for the interleaved block and not for each color component */ 458 void ihevc_sao_edge_offset_class1_chroma(UWORD8 *pu1_src, 459 WORD32 src_strd, 460 UWORD8 *pu1_src_left, 461 UWORD8 *pu1_src_top, 462 UWORD8 *pu1_src_top_left, 463 UWORD8 *pu1_src_top_right, 464 UWORD8 *pu1_src_bot_left, 465 UWORD8 *pu1_avail, 466 WORD8 *pi1_sao_offset_u, 467 WORD8 *pi1_sao_offset_v, 468 WORD32 wd, 469 WORD32 ht) 470 { 471 WORD32 row, col; 472 UWORD8 au1_mask[MAX_CTB_SIZE]; 473 UWORD8 au1_src_top_tmp[MAX_CTB_SIZE]; 474 WORD8 au1_sign_up[MAX_CTB_SIZE]; 475 WORD8 u1_sign_down; 476 WORD32 bit_depth; 477 UNUSED(pu1_src_top_right); 478 UNUSED(pu1_src_bot_left); 479 480 bit_depth = BIT_DEPTH_CHROMA; 481 482 /* Initialize the mask values */ 483 memset(au1_mask, 0xFF, MAX_CTB_SIZE); 484 485 /* Update left, top and top-left arrays */ 486 pu1_src_top_left[0] = pu1_src_top[wd - 2]; 487 pu1_src_top_left[1] = pu1_src_top[wd - 1]; 488 for(row = 0; row < ht; row++) 489 { 490 pu1_src_left[2 * row] = pu1_src[row * src_strd + wd - 2]; 491 pu1_src_left[2 * row + 1] = pu1_src[row * src_strd + wd - 1]; 492 } 493 for(col = 0; col < wd; col++) 494 { 495 au1_src_top_tmp[col] = pu1_src[(ht - 1) * src_strd + col]; 496 } 497 498 /* Update height and source pointers based on the availability flags */ 499 if(0 == pu1_avail[2]) 500 { 501 pu1_src += src_strd; 502 ht--; 503 for(col = 0; col < wd; col++) 504 { 505 au1_sign_up[col] = SIGN(pu1_src[col] - pu1_src[col - src_strd]); 506 } 507 } 508 else 509 { 510 for(col = 0; col < wd; col++) 511 { 512 au1_sign_up[col] = SIGN(pu1_src[col] - pu1_src_top[col]); 513 } 514 } 515 if(0 == pu1_avail[3]) 516 { 517 ht--; 518 } 519 520 /* Processing is done on the intermediate buffer and the output is written to the source buffer */ 521 { 522 for(row = 0; row < ht; row++) 523 { 524 for(col = 0; col < wd; col++) 525 { 526 WORD32 edge_idx; 527 WORD8 *pi1_sao_offset; 528 529 pi1_sao_offset = (0 == col % 2) ? pi1_sao_offset_u : pi1_sao_offset_v; 530 531 u1_sign_down = SIGN(pu1_src[col] - pu1_src[col + src_strd]); 532 edge_idx = 2 + au1_sign_up[col] + u1_sign_down; 533 au1_sign_up[col] = -u1_sign_down; 534 535 edge_idx = gi4_ihevc_table_edge_idx[edge_idx] & au1_mask[col >> 1]; 536 537 if(0 != edge_idx) 538 { 539 pu1_src[col] = CLIP3(pu1_src[col] + pi1_sao_offset[edge_idx], 0, (1 << bit_depth) - 1); 540 } 541 } 542 543 pu1_src += src_strd; 544 } 545 } 546 547 for(col = 0; col < wd; col++) 548 { 549 pu1_src_top[col] = au1_src_top_tmp[col]; 550 } 551 552 } 553 554 555 556 /* 135 degree filtering */ 557 void ihevc_sao_edge_offset_class2(UWORD8 *pu1_src, 558 WORD32 src_strd, 559 UWORD8 *pu1_src_left, 560 UWORD8 *pu1_src_top, 561 UWORD8 *pu1_src_top_left, 562 UWORD8 *pu1_src_top_right, 563 UWORD8 *pu1_src_bot_left, 564 UWORD8 *pu1_avail, 565 WORD8 *pi1_sao_offset, 566 WORD32 wd, 567 WORD32 ht) 568 { 569 WORD32 row, col; 570 UWORD8 au1_mask[MAX_CTB_SIZE]; 571 UWORD8 au1_src_left_tmp[MAX_CTB_SIZE], au1_src_top_tmp[MAX_CTB_SIZE]; 572 UWORD8 u1_src_top_left_tmp; 573 WORD8 au1_sign_up[MAX_CTB_SIZE + 1], au1_sign_up_tmp[MAX_CTB_SIZE + 1]; 574 WORD8 u1_sign_down; 575 WORD8 *pu1_sign_up; 576 WORD8 *pu1_sign_up_tmp; 577 UWORD8 *pu1_src_left_cpy; 578 579 WORD32 bit_depth; 580 UWORD8 u1_pos_0_0_tmp; 581 UWORD8 u1_pos_wd_ht_tmp; 582 UNUSED(pu1_src_top_right); 583 UNUSED(pu1_src_bot_left); 584 585 bit_depth = BIT_DEPTH_LUMA; 586 pu1_sign_up = au1_sign_up; 587 pu1_sign_up_tmp = au1_sign_up_tmp; 588 pu1_src_left_cpy = pu1_src_left; 589 590 /* Initialize the mask values */ 591 memset(au1_mask, 0xFF, MAX_CTB_SIZE); 592 593 /* Update left, top and top-left arrays */ 594 u1_src_top_left_tmp = pu1_src_top[wd - 1]; 595 for(row = 0; row < ht; row++) 596 { 597 au1_src_left_tmp[row] = pu1_src[row * src_strd + wd - 1]; 598 } 599 for(col = 0; col < wd; col++) 600 { 601 au1_src_top_tmp[col] = pu1_src[(ht - 1) * src_strd + col]; 602 } 603 604 605 /* If top-left is available, process separately */ 606 if(0 != pu1_avail[4]) 607 { 608 WORD32 edge_idx; 609 610 edge_idx = 2 + SIGN(pu1_src[0] - pu1_src_top_left[0]) + 611 SIGN(pu1_src[0] - pu1_src[1 + src_strd]); 612 613 edge_idx = gi4_ihevc_table_edge_idx[edge_idx]; 614 615 if(0 != edge_idx) 616 { 617 u1_pos_0_0_tmp = CLIP3(pu1_src[0] + pi1_sao_offset[edge_idx], 0, (1 << bit_depth) - 1); 618 } 619 else 620 { 621 u1_pos_0_0_tmp = pu1_src[0]; 622 } 623 } 624 else 625 { 626 u1_pos_0_0_tmp = pu1_src[0]; 627 } 628 629 /* If bottom-right is available, process separately */ 630 if(0 != pu1_avail[7]) 631 { 632 WORD32 edge_idx; 633 634 edge_idx = 2 + SIGN(pu1_src[wd - 1 + (ht - 1) * src_strd] - pu1_src[wd - 1 + (ht - 1) * src_strd - 1 - src_strd]) + 635 SIGN(pu1_src[wd - 1 + (ht - 1) * src_strd] - pu1_src[wd - 1 + (ht - 1) * src_strd + 1 + src_strd]); 636 637 edge_idx = gi4_ihevc_table_edge_idx[edge_idx]; 638 639 if(0 != edge_idx) 640 { 641 u1_pos_wd_ht_tmp = CLIP3(pu1_src[wd - 1 + (ht - 1) * src_strd] + pi1_sao_offset[edge_idx], 0, (1 << bit_depth) - 1); 642 } 643 else 644 { 645 u1_pos_wd_ht_tmp = pu1_src[wd - 1 + (ht - 1) * src_strd]; 646 } 647 } 648 else 649 { 650 u1_pos_wd_ht_tmp = pu1_src[wd - 1 + (ht - 1) * src_strd]; 651 } 652 653 /* If Left is not available */ 654 if(0 == pu1_avail[0]) 655 { 656 au1_mask[0] = 0; 657 } 658 659 /* If Top is not available */ 660 if(0 == pu1_avail[2]) 661 { 662 pu1_src += src_strd; 663 ht--; 664 pu1_src_left_cpy += 1; 665 for(col = 1; col < wd; col++) 666 { 667 pu1_sign_up[col] = SIGN(pu1_src[col] - pu1_src[col - 1 - src_strd]); 668 } 669 } 670 else 671 { 672 for(col = 1; col < wd; col++) 673 { 674 pu1_sign_up[col] = SIGN(pu1_src[col] - pu1_src_top[col - 1]); 675 } 676 } 677 678 /* If Right is not available */ 679 if(0 == pu1_avail[1]) 680 { 681 au1_mask[wd - 1] = 0; 682 } 683 684 /* If Bottom is not available */ 685 if(0 == pu1_avail[3]) 686 { 687 ht--; 688 } 689 690 /* Processing is done on the intermediate buffer and the output is written to the source buffer */ 691 { 692 for(row = 0; row < ht; row++) 693 { 694 pu1_sign_up[0] = SIGN(pu1_src[0] - pu1_src_left_cpy[row - 1]); 695 for(col = 0; col < wd; col++) 696 { 697 WORD32 edge_idx; 698 699 u1_sign_down = SIGN(pu1_src[col] - pu1_src[col + 1 + src_strd]); 700 edge_idx = 2 + pu1_sign_up[col] + u1_sign_down; 701 pu1_sign_up_tmp[col + 1] = -u1_sign_down; 702 703 edge_idx = gi4_ihevc_table_edge_idx[edge_idx] & au1_mask[col]; 704 705 if(0 != edge_idx) 706 { 707 pu1_src[col] = CLIP3(pu1_src[col] + pi1_sao_offset[edge_idx], 0, (1 << bit_depth) - 1); 708 } 709 } 710 711 /* Swapping pu1_sign_up_tmp and pu1_sign_up */ 712 { 713 WORD8 *pu1_swap_tmp = pu1_sign_up; 714 pu1_sign_up = pu1_sign_up_tmp; 715 pu1_sign_up_tmp = pu1_swap_tmp; 716 } 717 718 pu1_src += src_strd; 719 } 720 721 pu1_src[-(pu1_avail[2] ? ht : ht + 1) * src_strd] = u1_pos_0_0_tmp; 722 pu1_src[(pu1_avail[3] ? wd - 1 - src_strd : wd - 1)] = u1_pos_wd_ht_tmp; 723 } 724 725 if(0 == pu1_avail[2]) 726 ht++; 727 if(0 == pu1_avail[3]) 728 ht++; 729 *pu1_src_top_left = u1_src_top_left_tmp; 730 for(row = 0; row < ht; row++) 731 { 732 pu1_src_left[row] = au1_src_left_tmp[row]; 733 } 734 for(col = 0; col < wd; col++) 735 { 736 pu1_src_top[col] = au1_src_top_tmp[col]; 737 } 738 739 } 740 741 742 743 744 /* 135 degree filtering */ 745 void ihevc_sao_edge_offset_class2_chroma(UWORD8 *pu1_src, 746 WORD32 src_strd, 747 UWORD8 *pu1_src_left, 748 UWORD8 *pu1_src_top, 749 UWORD8 *pu1_src_top_left, 750 UWORD8 *pu1_src_top_right, 751 UWORD8 *pu1_src_bot_left, 752 UWORD8 *pu1_avail, 753 WORD8 *pi1_sao_offset_u, 754 WORD8 *pi1_sao_offset_v, 755 WORD32 wd, 756 WORD32 ht) 757 { 758 WORD32 row, col; 759 UWORD8 au1_mask[MAX_CTB_SIZE]; 760 UWORD8 au1_src_left_tmp[2 * MAX_CTB_SIZE], au1_src_top_tmp[MAX_CTB_SIZE]; 761 UWORD8 au1_src_top_left_tmp[2]; 762 WORD8 au1_sign_up[MAX_CTB_SIZE + 2], au1_sign_up_tmp[MAX_CTB_SIZE + 2]; 763 WORD8 u1_sign_down; 764 WORD8 *pu1_sign_up; 765 WORD8 *pu1_sign_up_tmp; 766 UWORD8 *pu1_src_left_cpy; 767 768 WORD32 bit_depth; 769 770 UWORD8 u1_pos_0_0_tmp_u; 771 UWORD8 u1_pos_0_0_tmp_v; 772 UWORD8 u1_pos_wd_ht_tmp_u; 773 UWORD8 u1_pos_wd_ht_tmp_v; 774 UNUSED(pu1_src_top_right); 775 UNUSED(pu1_src_bot_left); 776 777 778 bit_depth = BIT_DEPTH_CHROMA; 779 pu1_sign_up = au1_sign_up; 780 pu1_sign_up_tmp = au1_sign_up_tmp; 781 pu1_src_left_cpy = pu1_src_left; 782 783 /* Initialize the mask values */ 784 memset(au1_mask, 0xFF, MAX_CTB_SIZE); 785 786 /* Update left, top and top-left arrays */ 787 au1_src_top_left_tmp[0] = pu1_src_top[wd - 2]; 788 au1_src_top_left_tmp[1] = pu1_src_top[wd - 1]; 789 for(row = 0; row < ht; row++) 790 { 791 au1_src_left_tmp[2 * row] = pu1_src[row * src_strd + wd - 2]; 792 au1_src_left_tmp[2 * row + 1] = pu1_src[row * src_strd + wd - 1]; 793 } 794 for(col = 0; col < wd; col++) 795 { 796 au1_src_top_tmp[col] = pu1_src[(ht - 1) * src_strd + col]; 797 } 798 799 800 /* If top-left is available, process separately */ 801 if(0 != pu1_avail[4]) 802 { 803 WORD32 edge_idx; 804 805 /* U */ 806 edge_idx = 2 + SIGN(pu1_src[0] - pu1_src_top_left[0]) + 807 SIGN(pu1_src[0] - pu1_src[2 + src_strd]); 808 809 edge_idx = gi4_ihevc_table_edge_idx[edge_idx]; 810 811 if(0 != edge_idx) 812 { 813 u1_pos_0_0_tmp_u = CLIP3(pu1_src[0] + pi1_sao_offset_u[edge_idx], 0, (1 << bit_depth) - 1); 814 } 815 else 816 { 817 u1_pos_0_0_tmp_u = pu1_src[0]; 818 } 819 820 /* V */ 821 edge_idx = 2 + SIGN(pu1_src[1] - pu1_src_top_left[1]) + 822 SIGN(pu1_src[1] - pu1_src[1 + 2 + src_strd]); 823 824 edge_idx = gi4_ihevc_table_edge_idx[edge_idx]; 825 826 if(0 != edge_idx) 827 { 828 u1_pos_0_0_tmp_v = CLIP3(pu1_src[1] + pi1_sao_offset_v[edge_idx], 0, (1 << bit_depth) - 1); 829 } 830 else 831 { 832 u1_pos_0_0_tmp_v = pu1_src[1]; 833 } 834 } 835 else 836 { 837 u1_pos_0_0_tmp_u = pu1_src[0]; 838 u1_pos_0_0_tmp_v = pu1_src[1]; 839 } 840 841 /* If bottom-right is available, process separately */ 842 if(0 != pu1_avail[7]) 843 { 844 WORD32 edge_idx; 845 846 /* U */ 847 edge_idx = 2 + SIGN(pu1_src[wd - 2 + (ht - 1) * src_strd] - pu1_src[wd - 2 + (ht - 1) * src_strd - 2 - src_strd]) + 848 SIGN(pu1_src[wd - 2 + (ht - 1) * src_strd] - pu1_src[wd - 2 + (ht - 1) * src_strd + 2 + src_strd]); 849 850 edge_idx = gi4_ihevc_table_edge_idx[edge_idx]; 851 852 if(0 != edge_idx) 853 { 854 u1_pos_wd_ht_tmp_u = CLIP3(pu1_src[wd - 2 + (ht - 1) * src_strd] + pi1_sao_offset_u[edge_idx], 0, (1 << bit_depth) - 1); 855 } 856 else 857 { 858 u1_pos_wd_ht_tmp_u = pu1_src[wd - 2 + (ht - 1) * src_strd]; 859 } 860 861 /* V */ 862 edge_idx = 2 + SIGN(pu1_src[wd - 1 + (ht - 1) * src_strd] - pu1_src[wd - 1 + (ht - 1) * src_strd - 2 - src_strd]) + 863 SIGN(pu1_src[wd - 1 + (ht - 1) * src_strd] - pu1_src[wd - 1 + (ht - 1) * src_strd + 2 + src_strd]); 864 865 edge_idx = gi4_ihevc_table_edge_idx[edge_idx]; 866 867 if(0 != edge_idx) 868 { 869 u1_pos_wd_ht_tmp_v = CLIP3(pu1_src[wd - 1 + (ht - 1) * src_strd] + pi1_sao_offset_v[edge_idx], 0, (1 << bit_depth) - 1); 870 } 871 else 872 { 873 u1_pos_wd_ht_tmp_v = pu1_src[wd - 1 + (ht - 1) * src_strd]; 874 } 875 } 876 else 877 { 878 u1_pos_wd_ht_tmp_u = pu1_src[wd - 2 + (ht - 1) * src_strd]; 879 u1_pos_wd_ht_tmp_v = pu1_src[wd - 1 + (ht - 1) * src_strd]; 880 } 881 882 /* If Left is not available */ 883 if(0 == pu1_avail[0]) 884 { 885 au1_mask[0] = 0; 886 } 887 888 /* If Top is not available */ 889 if(0 == pu1_avail[2]) 890 { 891 pu1_src += src_strd; 892 pu1_src_left_cpy += 2; 893 ht--; 894 for(col = 2; col < wd; col++) 895 { 896 pu1_sign_up[col] = SIGN(pu1_src[col] - pu1_src[col - 2 - src_strd]); 897 } 898 } 899 else 900 { 901 for(col = 2; col < wd; col++) 902 { 903 pu1_sign_up[col] = SIGN(pu1_src[col] - pu1_src_top[col - 2]); 904 } 905 } 906 907 /* If Right is not available */ 908 if(0 == pu1_avail[1]) 909 { 910 au1_mask[(wd - 1) >> 1] = 0; 911 } 912 913 /* If Bottom is not available */ 914 if(0 == pu1_avail[3]) 915 { 916 ht--; 917 } 918 919 /* Processing is done on the intermediate buffer and the output is written to the source buffer */ 920 { 921 for(row = 0; row < ht; row++) 922 { 923 pu1_sign_up[0] = SIGN(pu1_src[0] - pu1_src_left_cpy[2 * (row - 1)]); 924 pu1_sign_up[1] = SIGN(pu1_src[1] - pu1_src_left_cpy[2 * (row - 1) + 1]); 925 for(col = 0; col < wd; col++) 926 { 927 WORD32 edge_idx; 928 WORD8 *pi1_sao_offset; 929 930 pi1_sao_offset = (0 == col % 2) ? pi1_sao_offset_u : pi1_sao_offset_v; 931 932 u1_sign_down = SIGN(pu1_src[col] - pu1_src[col + 2 + src_strd]); 933 edge_idx = 2 + pu1_sign_up[col] + u1_sign_down; 934 pu1_sign_up_tmp[col + 2] = -u1_sign_down; 935 936 edge_idx = gi4_ihevc_table_edge_idx[edge_idx] & au1_mask[col >> 1]; 937 938 if(0 != edge_idx) 939 { 940 pu1_src[col] = CLIP3(pu1_src[col] + pi1_sao_offset[edge_idx], 0, (1 << bit_depth) - 1); 941 } 942 } 943 944 /* Swapping pu1_sign_up_tmp and pu1_sign_up */ 945 { 946 WORD8 *pu1_swap_tmp = pu1_sign_up; 947 pu1_sign_up = pu1_sign_up_tmp; 948 pu1_sign_up_tmp = pu1_swap_tmp; 949 } 950 951 pu1_src += src_strd; 952 } 953 954 pu1_src[-(pu1_avail[2] ? ht : ht + 1) * src_strd] = u1_pos_0_0_tmp_u; 955 pu1_src[-(pu1_avail[2] ? ht : ht + 1) * src_strd + 1] = u1_pos_0_0_tmp_v; 956 pu1_src[(pu1_avail[3] ? wd - 2 - src_strd : wd - 2)] = u1_pos_wd_ht_tmp_u; 957 pu1_src[(pu1_avail[3] ? wd - 1 - src_strd : wd - 1)] = u1_pos_wd_ht_tmp_v; 958 } 959 960 if(0 == pu1_avail[2]) 961 ht++; 962 if(0 == pu1_avail[3]) 963 ht++; 964 pu1_src_top_left[0] = au1_src_top_left_tmp[0]; 965 pu1_src_top_left[1] = au1_src_top_left_tmp[1]; 966 for(row = 0; row < 2 * ht; row++) 967 { 968 pu1_src_left[row] = au1_src_left_tmp[row]; 969 } 970 for(col = 0; col < wd; col++) 971 { 972 pu1_src_top[col] = au1_src_top_tmp[col]; 973 } 974 975 } 976 977 978 979 980 /* 45 degree filtering */ 981 void ihevc_sao_edge_offset_class3(UWORD8 *pu1_src, 982 WORD32 src_strd, 983 UWORD8 *pu1_src_left, 984 UWORD8 *pu1_src_top, 985 UWORD8 *pu1_src_top_left, 986 UWORD8 *pu1_src_top_right, 987 UWORD8 *pu1_src_bot_left, 988 UWORD8 *pu1_avail, 989 WORD8 *pi1_sao_offset, 990 WORD32 wd, 991 WORD32 ht) 992 { 993 WORD32 row, col; 994 UWORD8 au1_mask[MAX_CTB_SIZE]; 995 UWORD8 au1_src_top_tmp[MAX_CTB_SIZE]; 996 UWORD8 au1_src_left_tmp[MAX_CTB_SIZE]; 997 UWORD8 u1_src_top_left_tmp; 998 WORD8 au1_sign_up[MAX_CTB_SIZE]; 999 UWORD8 *pu1_src_left_cpy; 1000 WORD8 u1_sign_down; 1001 WORD32 bit_depth; 1002 1003 UWORD8 u1_pos_0_ht_tmp; 1004 UWORD8 u1_pos_wd_0_tmp; 1005 1006 bit_depth = BIT_DEPTH_LUMA; 1007 pu1_src_left_cpy = pu1_src_left; 1008 1009 /* Initialize the mask values */ 1010 memset(au1_mask, 0xFF, MAX_CTB_SIZE); 1011 1012 /* Update left, top and top-left arrays */ 1013 u1_src_top_left_tmp = pu1_src_top[wd - 1]; 1014 for(row = 0; row < ht; row++) 1015 { 1016 au1_src_left_tmp[row] = pu1_src[row * src_strd + wd - 1]; 1017 } 1018 for(col = 0; col < wd; col++) 1019 { 1020 au1_src_top_tmp[col] = pu1_src[(ht - 1) * src_strd + col]; 1021 } 1022 1023 /* If top-right is available, process separately */ 1024 if(0 != pu1_avail[5]) 1025 { 1026 WORD32 edge_idx; 1027 1028 edge_idx = 2 + SIGN(pu1_src[wd - 1] - pu1_src_top_right[0]) + 1029 SIGN(pu1_src[wd - 1] - pu1_src[wd - 1 - 1 + src_strd]); 1030 1031 edge_idx = gi4_ihevc_table_edge_idx[edge_idx]; 1032 1033 if(0 != edge_idx) 1034 { 1035 u1_pos_wd_0_tmp = CLIP3(pu1_src[wd - 1] + pi1_sao_offset[edge_idx], 0, (1 << bit_depth) - 1); 1036 } 1037 else 1038 { 1039 u1_pos_wd_0_tmp = pu1_src[wd - 1]; 1040 } 1041 } 1042 else 1043 { 1044 u1_pos_wd_0_tmp = pu1_src[wd - 1]; 1045 } 1046 1047 /* If bottom-left is available, process separately */ 1048 if(0 != pu1_avail[6]) 1049 { 1050 WORD32 edge_idx; 1051 1052 edge_idx = 2 + SIGN(pu1_src[(ht - 1) * src_strd] - pu1_src[(ht - 1) * src_strd + 1 - src_strd]) + 1053 SIGN(pu1_src[(ht - 1) * src_strd] - pu1_src_bot_left[0]); 1054 1055 edge_idx = gi4_ihevc_table_edge_idx[edge_idx]; 1056 1057 if(0 != edge_idx) 1058 { 1059 u1_pos_0_ht_tmp = CLIP3(pu1_src[(ht - 1) * src_strd] + pi1_sao_offset[edge_idx], 0, (1 << bit_depth) - 1); 1060 } 1061 else 1062 { 1063 u1_pos_0_ht_tmp = pu1_src[(ht - 1) * src_strd]; 1064 } 1065 } 1066 else 1067 { 1068 u1_pos_0_ht_tmp = pu1_src[(ht - 1) * src_strd]; 1069 } 1070 1071 /* If Left is not available */ 1072 if(0 == pu1_avail[0]) 1073 { 1074 au1_mask[0] = 0; 1075 } 1076 1077 /* If Top is not available */ 1078 if(0 == pu1_avail[2]) 1079 { 1080 pu1_src += src_strd; 1081 ht--; 1082 pu1_src_left_cpy += 1; 1083 for(col = 0; col < wd - 1; col++) 1084 { 1085 au1_sign_up[col] = SIGN(pu1_src[col] - pu1_src[col + 1 - src_strd]); 1086 } 1087 } 1088 else 1089 { 1090 for(col = 0; col < wd - 1; col++) 1091 { 1092 au1_sign_up[col] = SIGN(pu1_src[col] - pu1_src_top[col + 1]); 1093 } 1094 } 1095 1096 /* If Right is not available */ 1097 if(0 == pu1_avail[1]) 1098 { 1099 au1_mask[wd - 1] = 0; 1100 } 1101 1102 /* If Bottom is not available */ 1103 if(0 == pu1_avail[3]) 1104 { 1105 ht--; 1106 } 1107 1108 /* Processing is done on the intermediate buffer and the output is written to the source buffer */ 1109 { 1110 for(row = 0; row < ht; row++) 1111 { 1112 au1_sign_up[wd - 1] = SIGN(pu1_src[wd - 1] - pu1_src[wd - 1 + 1 - src_strd]); 1113 for(col = 0; col < wd; col++) 1114 { 1115 WORD32 edge_idx; 1116 1117 u1_sign_down = SIGN(pu1_src[col] - ((col == 0) ? pu1_src_left_cpy[row + 1] : 1118 pu1_src[col - 1 + src_strd])); 1119 edge_idx = 2 + au1_sign_up[col] + u1_sign_down; 1120 if(col > 0) 1121 au1_sign_up[col - 1] = -u1_sign_down; 1122 1123 edge_idx = gi4_ihevc_table_edge_idx[edge_idx] & au1_mask[col]; 1124 1125 if(0 != edge_idx) 1126 { 1127 pu1_src[col] = CLIP3(pu1_src[col] + pi1_sao_offset[edge_idx], 0, (1 << bit_depth) - 1); 1128 } 1129 } 1130 1131 pu1_src += src_strd; 1132 } 1133 1134 pu1_src[-(pu1_avail[2] ? ht : ht + 1) * src_strd + wd - 1] = u1_pos_wd_0_tmp; 1135 pu1_src[(pu1_avail[3] ? (-src_strd) : 0)] = u1_pos_0_ht_tmp; 1136 } 1137 1138 if(0 == pu1_avail[2]) 1139 ht++; 1140 if(0 == pu1_avail[3]) 1141 ht++; 1142 *pu1_src_top_left = u1_src_top_left_tmp; 1143 for(row = 0; row < ht; row++) 1144 { 1145 pu1_src_left[row] = au1_src_left_tmp[row]; 1146 } 1147 for(col = 0; col < wd; col++) 1148 { 1149 pu1_src_top[col] = au1_src_top_tmp[col]; 1150 } 1151 1152 } 1153 1154 1155 1156 1157 void ihevc_sao_edge_offset_class3_chroma(UWORD8 *pu1_src, 1158 WORD32 src_strd, 1159 UWORD8 *pu1_src_left, 1160 UWORD8 *pu1_src_top, 1161 UWORD8 *pu1_src_top_left, 1162 UWORD8 *pu1_src_top_right, 1163 UWORD8 *pu1_src_bot_left, 1164 UWORD8 *pu1_avail, 1165 WORD8 *pi1_sao_offset_u, 1166 WORD8 *pi1_sao_offset_v, 1167 WORD32 wd, 1168 WORD32 ht) 1169 { 1170 WORD32 row, col; 1171 UWORD8 au1_mask[MAX_CTB_SIZE]; 1172 UWORD8 au1_src_left_tmp[2 * MAX_CTB_SIZE], au1_src_top_tmp[MAX_CTB_SIZE]; 1173 UWORD8 au1_src_top_left_tmp[2]; 1174 WORD8 au1_sign_up[MAX_CTB_SIZE]; 1175 UWORD8 *pu1_src_left_cpy; 1176 WORD8 u1_sign_down; 1177 WORD32 bit_depth; 1178 1179 UWORD8 u1_pos_wd_0_tmp_u; 1180 UWORD8 u1_pos_wd_0_tmp_v; 1181 UWORD8 u1_pos_0_ht_tmp_u; 1182 UWORD8 u1_pos_0_ht_tmp_v; 1183 1184 bit_depth = BIT_DEPTH_CHROMA; 1185 pu1_src_left_cpy = pu1_src_left; 1186 1187 /* Initialize the mask values */ 1188 memset(au1_mask, 0xFF, MAX_CTB_SIZE); 1189 1190 /* Update left, top and top-left arrays */ 1191 au1_src_top_left_tmp[0] = pu1_src_top[wd - 2]; 1192 au1_src_top_left_tmp[1] = pu1_src_top[wd - 1]; 1193 for(row = 0; row < ht; row++) 1194 { 1195 au1_src_left_tmp[2 * row] = pu1_src[row * src_strd + wd - 2]; 1196 au1_src_left_tmp[2 * row + 1] = pu1_src[row * src_strd + wd - 1]; 1197 } 1198 for(col = 0; col < wd; col++) 1199 { 1200 au1_src_top_tmp[col] = pu1_src[(ht - 1) * src_strd + col]; 1201 } 1202 1203 1204 /* If top-right is available, process separately */ 1205 if(0 != pu1_avail[5]) 1206 { 1207 WORD32 edge_idx; 1208 1209 /* U */ 1210 edge_idx = 2 + SIGN(pu1_src[wd - 2] - pu1_src_top_right[0]) + 1211 SIGN(pu1_src[wd - 2] - pu1_src[wd - 2 - 2 + src_strd]); 1212 1213 edge_idx = gi4_ihevc_table_edge_idx[edge_idx]; 1214 1215 if(0 != edge_idx) 1216 { 1217 u1_pos_wd_0_tmp_u = CLIP3(pu1_src[wd - 2] + pi1_sao_offset_u[edge_idx], 0, (1 << bit_depth) - 1); 1218 } 1219 else 1220 { 1221 u1_pos_wd_0_tmp_u = pu1_src[wd - 2]; 1222 } 1223 1224 /* V */ 1225 edge_idx = 2 + SIGN(pu1_src[wd - 1] - pu1_src_top_right[1]) + 1226 SIGN(pu1_src[wd - 1] - pu1_src[wd - 1 - 2 + src_strd]); 1227 1228 edge_idx = gi4_ihevc_table_edge_idx[edge_idx]; 1229 1230 if(0 != edge_idx) 1231 { 1232 u1_pos_wd_0_tmp_v = CLIP3(pu1_src[wd - 1] + pi1_sao_offset_v[edge_idx], 0, (1 << bit_depth) - 1); 1233 } 1234 else 1235 { 1236 u1_pos_wd_0_tmp_v = pu1_src[wd - 1]; 1237 } 1238 } 1239 else 1240 { 1241 u1_pos_wd_0_tmp_u = pu1_src[wd - 2]; 1242 u1_pos_wd_0_tmp_v = pu1_src[wd - 1]; 1243 } 1244 1245 /* If bottom-left is available, process separately */ 1246 if(0 != pu1_avail[6]) 1247 { 1248 WORD32 edge_idx; 1249 1250 /* U */ 1251 edge_idx = 2 + SIGN(pu1_src[(ht - 1) * src_strd] - pu1_src[(ht - 1) * src_strd + 2 - src_strd]) + 1252 SIGN(pu1_src[(ht - 1) * src_strd] - pu1_src_bot_left[0]); 1253 1254 edge_idx = gi4_ihevc_table_edge_idx[edge_idx]; 1255 1256 if(0 != edge_idx) 1257 { 1258 u1_pos_0_ht_tmp_u = CLIP3(pu1_src[(ht - 1) * src_strd] + pi1_sao_offset_u[edge_idx], 0, (1 << bit_depth) - 1); 1259 } 1260 else 1261 { 1262 u1_pos_0_ht_tmp_u = pu1_src[(ht - 1) * src_strd]; 1263 } 1264 1265 /* V */ 1266 edge_idx = 2 + SIGN(pu1_src[(ht - 1) * src_strd + 1] - pu1_src[(ht - 1) * src_strd + 1 + 2 - src_strd]) + 1267 SIGN(pu1_src[(ht - 1) * src_strd + 1] - pu1_src_bot_left[1]); 1268 1269 edge_idx = gi4_ihevc_table_edge_idx[edge_idx]; 1270 1271 if(0 != edge_idx) 1272 { 1273 u1_pos_0_ht_tmp_v = CLIP3(pu1_src[(ht - 1) * src_strd + 1] + pi1_sao_offset_v[edge_idx], 0, (1 << bit_depth) - 1); 1274 } 1275 else 1276 { 1277 u1_pos_0_ht_tmp_v = pu1_src[(ht - 1) * src_strd + 1]; 1278 } 1279 } 1280 else 1281 { 1282 u1_pos_0_ht_tmp_u = pu1_src[(ht - 1) * src_strd]; 1283 u1_pos_0_ht_tmp_v = pu1_src[(ht - 1) * src_strd + 1]; 1284 } 1285 1286 /* If Left is not available */ 1287 if(0 == pu1_avail[0]) 1288 { 1289 au1_mask[0] = 0; 1290 } 1291 1292 /* If Top is not available */ 1293 if(0 == pu1_avail[2]) 1294 { 1295 pu1_src += src_strd; 1296 ht--; 1297 pu1_src_left_cpy += 2; 1298 for(col = 0; col < wd - 2; col++) 1299 { 1300 au1_sign_up[col] = SIGN(pu1_src[col] - pu1_src[col + 2 - src_strd]); 1301 } 1302 } 1303 else 1304 { 1305 for(col = 0; col < wd - 2; col++) 1306 { 1307 au1_sign_up[col] = SIGN(pu1_src[col] - pu1_src_top[col + 2]); 1308 } 1309 } 1310 1311 /* If Right is not available */ 1312 if(0 == pu1_avail[1]) 1313 { 1314 au1_mask[(wd - 1) >> 1] = 0; 1315 } 1316 1317 /* If Bottom is not available */ 1318 if(0 == pu1_avail[3]) 1319 { 1320 ht--; 1321 } 1322 1323 /* Processing is done on the intermediate buffer and the output is written to the source buffer */ 1324 { 1325 for(row = 0; row < ht; row++) 1326 { 1327 au1_sign_up[wd - 2] = SIGN(pu1_src[wd - 2] - pu1_src[wd - 2 + 2 - src_strd]); 1328 au1_sign_up[wd - 1] = SIGN(pu1_src[wd - 1] - pu1_src[wd - 1 + 2 - src_strd]); 1329 for(col = 0; col < wd; col++) 1330 { 1331 WORD32 edge_idx; 1332 WORD8 *pi1_sao_offset; 1333 1334 pi1_sao_offset = (0 == col % 2) ? pi1_sao_offset_u : pi1_sao_offset_v; 1335 1336 u1_sign_down = SIGN(pu1_src[col] - ((col < 2) ? pu1_src_left_cpy[2 * (row + 1) + col] : 1337 pu1_src[col - 2 + src_strd])); 1338 edge_idx = 2 + au1_sign_up[col] + u1_sign_down; 1339 if(col > 1) 1340 au1_sign_up[col - 2] = -u1_sign_down; 1341 1342 edge_idx = gi4_ihevc_table_edge_idx[edge_idx] & au1_mask[col >> 1]; 1343 1344 if(0 != edge_idx) 1345 { 1346 pu1_src[col] = CLIP3(pu1_src[col] + pi1_sao_offset[edge_idx], 0, (1 << bit_depth) - 1); 1347 } 1348 } 1349 1350 pu1_src += src_strd; 1351 } 1352 1353 pu1_src[-(pu1_avail[2] ? ht : ht + 1) * src_strd + wd - 2] = u1_pos_wd_0_tmp_u; 1354 pu1_src[-(pu1_avail[2] ? ht : ht + 1) * src_strd + wd - 1] = u1_pos_wd_0_tmp_v; 1355 pu1_src[(pu1_avail[3] ? (-src_strd) : 0)] = u1_pos_0_ht_tmp_u; 1356 pu1_src[(pu1_avail[3] ? (-src_strd) : 0) + 1] = u1_pos_0_ht_tmp_v; 1357 } 1358 1359 if(0 == pu1_avail[2]) 1360 ht++; 1361 if(0 == pu1_avail[3]) 1362 ht++; 1363 pu1_src_top_left[0] = au1_src_top_left_tmp[0]; 1364 pu1_src_top_left[1] = au1_src_top_left_tmp[1]; 1365 for(row = 0; row < 2 * ht; row++) 1366 { 1367 pu1_src_left[row] = au1_src_left_tmp[row]; 1368 } 1369 for(col = 0; col < wd; col++) 1370 { 1371 pu1_src_top[col] = au1_src_top_tmp[col]; 1372 } 1373 1374 } 1375
